Can't create an API version without expiry date

[xagaba]

As the post reads, I can't add a version without expiry date...
After the Add, when I select 'Update' the empty expiry date converts to actual date.
I'm using Firefox 45 in Linux
As a collateral if I put a 2099 year, every 'Update' press, increments de first version date by one...

[Martin]

That's a UI bug, and probably Firefox only. If you leave it blank, then when it updates, the date will be blank (you can check this, as the version would be inaccessible if this were true).

[Sean_Russell]

I see the same issue in Chrome. You can wipe the date and save it, but when the page reloads it auto-populates with the current date. It makes it difficult to know whether it is indeed blank, or what the current value is.

I see this on versioned APIs. I don't know if I've seen it on non-versioned APIs. However, I don't think it is limited to Firefox.